<?php

/**
 * @file
 * Contains the 'node' argument validator plugin.
 */

/**
 * Validate whether an argument is an acceptable node.
 */
class views_plugin_argument_validate_node extends views_plugin_argument_validate {

    var $option_name = 'validate_argument_node_type';

    function validate_form(&$form, &$form_state) {
        $types = node_get_types();
        foreach ($types as $type => $info) {
            $options[$type] = check_plain(t($info->name));
        }

        $arg = $this->get_argument();
        if (empty($arg)) {
            $arg = array();
        }

        $form[$this->option_name] = array(
            '#type' => 'checkboxes',
            '#prefix' => '<div id="edit-options-validate-argument-node-type-wrapper">',
            '#suffix' => '</div>',
            '#title' => t('Types'),
            '#options' => $options,
            '#default_value' => $arg,
            '#description' => t('If you wish to validate for specific node types, check them; if none are checked, all nodes will pass.'),
            '#process' => array('expand_checkboxes', 'views_process_dependency'),
            '#dependency' => array('edit-options-validate-type' => array($this->id)),
        );

        $form['validate_argument_node_access'] = array(
            '#type' => 'checkbox',
            '#title' => t('Validate user has access to the node'),
            '#default_value' => !empty($this->argument->options['validate_argument_node_access']),
            '#process' => array('views_process_dependency'),
            '#dependency' => array('edit-options-validate-type' => array($this->id)),
        );

        $form['validate_argument_nid_type'] = array(
            '#type' => 'select',
            '#title' => t('Argument type'),
            '#options' => array(
                'nid' => t('Node ID'),
                'nids' => t('Node IDs separated by , or +'),
            ),
            '#default_value' => isset($this->argument->options['validate_argument_nid_type']) ? $this->argument->options['validate_argument_nid_type'] : 'nid',
            '#process' => array('views_process_dependency'),
            '#dependency' => array('edit-options-validate-type' => array($this->id)),
        );
    }

    function validate_argument($argument) {
        $types = array_filter($this->argument->options[$this->option_name]);

        $type = isset($this->argument->options['validate_argument_nid_type']) ? $this->argument->options['validate_argument_nid_type'] : 'nid';

        switch ($type) {
            case 'nid':
                if (!is_numeric($argument)) {
                    return FALSE;
                }
                $node = node_load($argument);
                if (!$node) {
                    return FALSE;
                }

                if (!empty($this->argument->options['validate_argument_node_access'])) {
                    if (!node_access('view', $node)) {
                        return FALSE;
                    }
                }

                // Save the title() handlers some work.
                $this->argument->validated_title = check_plain($node->title);

                if (empty($types)) {
                    return TRUE;
                }

                return isset($types[$node->type]);
                break;
            case 'nids':
                $nids = new stdClass();
                $nids->value = array($argument);
                $nids = views_break_phrase($argument, $nids);
                if ($nids->value == -1) {
                    return FALSE;
                }

                $placeholders = implode(', ', array_fill(0, sizeof($nids->value), '%d'));

                $test = drupal_map_assoc($nids->value);
                $titles = array();

                $result = db_query("SELECT * FROM {node} WHERE nid IN ($placeholders)", $nids->value);
                while ($node = db_fetch_object($result)) {
                    if ($types && empty($types[$node->type])) {
                        return FALSE;
                    }

                    if (!empty($this->argument->options['validate_argument_node_access'])) {
                        if (!node_access('view', $node)) {
                            return FALSE;
                        }
                    }

                    $titles[] = check_plain($node->title);
                    unset($test[$node->nid]);
                }

                $this->argument->validated_title = implode($nids->operator == 'or' ? ' + ' : ', ', $titles);
                // If this is not empty, we did not find a nid.
                return empty($test);
        }
    }

}

